US20140263322A1 - Coring-free valve system - Google Patents
Coring-free valve system Download PDFInfo
- Publication number
- US20140263322A1 US20140263322A1 US13/802,935 US201313802935A US2014263322A1 US 20140263322 A1 US20140263322 A1 US 20140263322A1 US 201313802935 A US201313802935 A US 201313802935A US 2014263322 A1 US2014263322 A1 US 2014263322A1
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- United States
- Prior art keywords
- septum
- needle
- accordance
- expansion portion
- valve system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims abstract description 59
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 15
- 239000012858 resilient material Substances 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
- B65D51/002—Closures to be pierced by an extracting-device for the contents and fixed on the container by separate retaining means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/04—Access sites having pierceable self-sealing members
- A61M39/045—Access sites having pierceable self-sealing members pre-slit to be pierced by blunt instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0081—Means for facilitating introduction of a needle in the septum, e.g. guides, special construction of septum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1072—Tube connectors; Tube couplings with a septum present in the connector
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
- A61M2039/242—Check- or non-return valves designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
- A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
Definitions
- the field relates generally to fluid valve systems, and more particularly to fluid valve systems having septa or a septum for receiving a needle.
- Many conventional valve systems for sealing a container include a septum designed to be pierced by a needle or cannula of a syringe. Fluid may be transferred through the needle from the container to the syringe or vice versa.
- Conventional needles often have holes at or near the tip of the needle. Holes through the septum formed by the needle may have an undesirable coring effect on the septum in which the needle undesirably removes a piece of the septum and creates particulates. These particulates may clog the needle or tube and obstruct the flow path of the fluid, or be released into the flow path and possibly into the patient. The particulates may further contaminate any fluid flowing through the flow path.
- Some septa have a pre-formed slit designed to receive the needle, but the needle may pierce the septum anywhere the tip makes contact, and may not necessarily be inserted through the slit area.
- a valve system for receiving a needle comprises a housing defining at least a portion of a fluid flow channel.
- the housing includes a first end, a second end, and a receiving portion.
- a septum is mounted in the housing for sealing the first end of the housing.
- the septum includes a longitudinal axis and is formed from a resilient material.
- the septum also includes a head portion including a tapered opening configured to receive the needle, a sealing portion configured to create a seal around the needle, and an expansion portion extending from the head portion opposite the tapered opening.
- the expansion portion includes a chamber having a closed end, at least one relief channel, and apertures formed in the relief channel. The apertures facilitate fluid communication between the chamber and the receiving portion when the expansion portion is extended parallel to the longitudinal axis into the receiving portion in an open position. The apertures are also configured to prevent flow communication when the expansion portion is in a closed position.
- a septum in another aspect, comprises a head portion including a tapered opening configured to receive a needle about a longitudinal axis, a sealing portion configured to create a seal about a needle, and an expansion portion extending from the head portion opposite the tapered opening.
- the expansion portion includes a chamber having a closed end housed within the expansion portion, at least one relief channel, and a plurality of apertures formed in the relief channel. The apertures facilitate flow communication through the expansion portion when the expansion portion is extended parallel to the longitudinal axis in an open position. The apertures also prevent flow communication when the expansion portion is in a closed position.
- FIG. 1 is an exploded perspective view of a valve system including a cap, a septum, and a housing of one embodiment
- FIG. 2A and FIG. 2B respectively show perspective and side views of the septum of FIG. 1 in a closed position
- FIG. 3A and FIG. 3B respectively show perspective and side views of the septum of FIG. 1 in an intermediate position
- FIG. 4A and FIG. 4B respectively show perspective and side views of the septum of FIG. 1 in an open position
- FIG. 5 is a cross-section view of the valve system of FIG. 1 with the septum in a closed position;
- FIG. 6 is a cross-section view of the valve system of FIG. 1 with the septum in an intermediate position
- FIG. 7 is a cross-section view of the valve system of FIG. 1 with the septum in an open position
- a system generally designated 100 is for use with a medical device of a fluid delivery system.
- system 100 may be used with other devices without departing from the scope of this disclosure.
- system 100 is configured to prevent coring of an expanding member, such as a septum 102 , when a needle (not shown in FIG. 1 ) is inserted therein, while maintaining a fluid flow channel (not shown in FIG. 1 ) therethrough.
- System 100 includes a cap 106 having a tapered opening 122 for receiving the needle, a housing 104 having a first end 108 for receiving cap 106 , a receiving chamber 114 for receiving septum 102 that controls fluid flow through system 100 , and a second end 110 to facilitate directing fluid between system 100 and a medical device.
- Housing 104 , septum 102 , and cap 106 are configured to be coaxially aligned along longitudinal centerline axis 101 .
- the fluid is in liquid form and passes through a centrally formed fluid flow channel as described in further detail below.
- valve system 100 may be connected to a medical valve connector, such as a Luer connector.
- system 100 may be used to transfer a fluid between any two devices. For example, for transferring fluid between a needle or cannula and a vial, for use in a pumping system for filling or emptying a vial or tube, or for transferring fluid between a needle and an IV line.
- a conventional needle such as a bevel-tipped needle may be used, or a blunt-tipped cannula including a side port.
- any needle or cannula may be used with system 100 .
- septum 102 is mounted within housing 104 of system 100 for sealing housing first end 108 and is substantially secured within housing 104 by cap 106 .
- system 100 is designed as a two-way fluid connector valve for flow of fluid between two medical devices, it is to be understood that the direction of fluid flow as well as the particular details, size and shape of system 100 and its components may vary, including providing for one-way fluid flow, if desired.
- cap 106 is configured to be coupled to first end 108 of housing 104 .
- cap 106 is coupled to housing 104 via a press-fit connection.
- cap 106 may be coupled to first end 108 of housing 104 by any connection means that allows for system 100 to function as described herein, such as threadably coupled, snap-fit, or permanently attached.
- Cap 106 includes a first end 119 and an opposing second end 121 .
- Cap first end 119 includes conically-tapered opening 122 that narrows within cap 106 and is defined by an annular guiding surface 120 .
- Guiding surface 120 extends into cap 106 such that opening 122 terminates between first end 119 and second end 121 .
- Guiding surface 120 is configured to direct the needle through taped opening 122 .
- Cap 106 is formed of a hard, durable material such that contact with the needle does not damage cap 106 .
- septum 102 includes two adjacent elements or portions.
- septum 102 includes a head portion 124 and an expansion portion 128 .
- a first end 123 of head portion 124 includes a second tapered opening 136 configured to receive a needle and expansion portion 128 includes a chamber (not shown in FIG. 1 ) defined therein and a relief channel 126 .
- Expansion portion 128 extends from a head portion second end 125 opposite tapered opening 136 .
- a sealing portion (not shown in FIG. 1 ) is defined within septum 102 between tapered opening 136 and the chamber. The sealing portion is configured to create a seal about the needle.
- the chamber is configured to receive the needle such that a pushing force by the needle facilitates to elongate expansion portion 128 along axis 101 as described in further detail below.
- Housing 104 includes first end 108 and opposing second and 110 .
- First end 108 is configured to accept cap 106 on an outer surface 109 and is further configured to receive septum 102 within receiving chamber 114 within first end 108 .
- Second end 110 includes a fluid flow member 118 and a connector portion (not shown in FIG. 1 ) for connecting system 100 to a medical device, such as a Luer device.
- the connector portion may be threaded for ease of connection to the device. It is to be noted that any type of medical device may be connected to the connector portion of the second end 110 .
- system 100 will be described with respect to the needle of a syringe being inserted into opening 122 and a Luer device being connected to the connector portion of the second end 110 , where the Luer device is in communication with a fluid delivery system, such as an I.V. set.
- a fluid delivery system such as an I.V. set.
- the Luer device and I.V. set are omitted from the drawings for brevity.
- FIGS. 2A , 3 A, and 4 A illustrate a cross-sectional perspective view of septum 102 in the closed position, intermediate position, and open position, respectively.
- FIGS. 2B , 3 B, and 4 B show a perspective side view of septum 102 in the closed position, intermediate position, and open position, respectively.
- Septum 102 is made of a single piece of a substantially resilient material, such as rubber, latex, or silicone. Alternatively, septum 102 may be formed of any resilient material that enables system 100 to function as described herein.
- septum 102 includes head portion 124 and expansion portion 128 . Head portion 124 includes first end 123 and opposing second end 125 .
- expansion portion 128 extends from head portion second end 125 opposite sealing portion 132 and opening 136 .
- Expansion portion 128 includes a chamber 130 defined therein. Chamber 130 extends within expansion portion 128 between sealing portion 132 and a closed end 134 of chamber 130 .
- Septum 102 is configured such that opening 136 , sealing portion 132 , and chamber 130 are co-axial about centerline 101 and form a single-ended tunnel between head portion first end 123 and chamber closed end 134 .
- Expansion portion 128 further includes a relief channel 126 formed in an outer wall 127 of expansion portion 128 and has a depth of approximately half the thickness of outer wall 127 .
- relief channel 126 may be of any depth that facilitates septum 102 to function as described herein.
- relief channel 126 is a continuously-spiraled channel defined between head portion second end 125 and a distal tip of expansion portion 128 .
- Relief channel 126 terminates with a complete circular cut about the base of extension portion 128 at the union of expansion portion 128 and head portion second end 125 .
- relief channel 126 may be a plurality or series of individual channels formed in outer wall 127 .
- FIGS. 2A and 2B show septum 102 in the relaxed, or closed, position, wherein expansion portion 128 is at rest and has a first length L 1 .
- relief channel 126 is closed and appears as a spiraled line about expansion portion 128 .
- FIGS. 3A and 3B show septum 102 in an intermediate position, wherein expansion portion 128 is at least partially expanded. In the intermediate position, expansion portion 128 has a second length L 2 , which is greater than first length L 1 .
- extension portion 128 is extended in a longitudinal direction along axis 101 such that relief channel 126 becomes more defined and begins to separate. Expansion portion 128 lengthens in the intermediate position such that the interior volume of chamber 130 is greater in the intermediate position than in the closed position.
- FIGS. 4A and 4B show septum 102 in the fully open position, wherein expansion portion 128 has a third length L 3 greater than first and second lengths, L 1 and L 2 .
- expansion portion 128 In the open position, expansion portion 128 is fully expanded and the interior volume of chamber 130 is greater in the open position than in the intermediate and closed positions.
- relief channel 126 In the open position, relief channel 126 is fully open and exposes a plurality of apertures 138 defined within relief channel 126 .
- Apertures 138 facilitate flow communication through outer wall 127 of expansion portion 128 between chamber 130 and the atmosphere surrounding expansion portion 128 .
- apertures 138 facilitate fluid flow through expansion portion 128 between chamber 130 and receiving chamber 114 of housing 104 when expansion portion 128 is extended parallel to longitudinal axis 101 into receiving chamber 114 in the open position, as shown in FIGS. 5-7 .
- FIG. 5 is a cross-section of system 100 with septum 102 in the closed position.
- FIG. 6 is a cross-section view of system 100 with septum 102 in the intermediate position.
- FIG. 7 is a cross-section view of system 100 with septum 102 in the open position.
- septum 102 is configured to seal first end 108 of housing 104 .
- septum 102 is mounted into receiving chamber 114 of housing 104 .
- Septum 102 is contained within receiving chamber 114 by cap 106 , which is coupled to first end 108 of housing 104 .
- cap 106 is coupled to outer surface 109 of housing first end 108 via a press-fit.
- Expansion portion 128 extends a distance L 1 into receiving chamber 114 of housing 104 from head portion 124 of septum 102 when in the closed position (shown in FIG. 5 ). In the closed position, sealing portion 132 has a first diameter D 1 .
- System 100 further includes a nosecone 103 housed within closed end 134 of chamber 130 of septum 102 .
- nosecone 103 is formed of a metallic material, such as stainless steel, and is configured to prevent the piercing of septum 102 by needle 150 and to facilitate extension of expansion portion 128 during a transition from the closed position to the open position to establish a fluid flow channel as described in further detail below.
- nosecone 103 is configured to align expansion portion 128 with longitudinal axis 101 .
- System 100 further includes a biasing mechanism 105 to facilitate operation of system 100 , and, more specifically, septum 102 .
- biasing mechanism 105 is a coil spring 107 positioned within receiving chamber 114 of housing 104 between fluid flow member 118 and a distal end of expansion portion 128 .
- biasing mechanism 105 may be a spring that forms a portion of the resilient material comprising expansion portion 128 of septum 102 .
- Biasing mechanism 105 is configured to facilitate closure of septum 102 when transitioning from the open position to the closed position as described in further detail below.
- system 100 will be described with respect to needle 150 of a syringe 160 being inserted into opening 122 and a Luer device being connected to connector portion 117 of the second end 110 , where the Luer device is in communication with a fluid delivery system, such as an I.V. set.
- a fluid delivery system such as an I.V. set.
- the Luer device and I.V. set are omitted from the drawings for simplicity.
- sealing portion 132 in the closed position is smaller than the diameter D 2 of needle, such that as needle 150 penetrates opening 136 , sealing portion 132 of septum 102 expands radially to accommodate the larger diameter needle 150 . Accordingly, a seal is created about needle 150 at sealing portion 132 of septum 102 that excludes exterior gases, liquids, or airborne matter from housing 104 .
- nosecone 103 prevents the piercing or coring of septum 102 by needle tip 154 .
- system 100 eliminates the possibility of particulates from septum 102 clogging needle 150 , contaminating the fluid transferred, or being introduced into the patient.
- insertion of needle 150 facilitates deformation of septum 102 by extending expansion portion 128 into receiving chamber a distance L 2 , which is greater than distance L 1 .
- expansion portion 128 transitions from the intermediate position to the open position.
- the continued force of needle tip 154 upon nosecone 103 extends expansion portion 128 parallel to axis 101 into receiving chamber 114 a distance L 3 , which is greater than both distances L 1 and L 2 , in the open position.
- Nosecone 103 also prevents obstruction of a needle side port 152 by an interior wall 142 of chamber 130 by acting as a spacer between side port 152 and interior wall 142 .
- the extension of expansion portion 128 further compresses spring 107 such that spring 107 limits the extension of expansion portion 128 to prevent damaging septum 102 .
- expansion portion 128 is fully extended in the open position such that relief channel 126 fully opens to expose a plurality of apertures 138 defined therein.
- fluid flow member 118 , receiving chamber 114 , and septum 102 form a fluid flow channel 112 through housing 104 of system 100 to facilitate the transfer of fluid between syringe 160 and the Luer device. Accordingly, when septum 102 is in the open position, fluid may flow through the following structures (in the noted order), which as a whole make up fluid flow channel 112 : syringe 160 ; needle 150 ; chamber 130 (via needle side port 152 ); receiving chamber 114 (via apertures 138 ); fluid flow member 118 ; and the Luer device.
- the plurality of apertures 138 and extension of expansion portion 128 facilitate fluid communication between syringe 160 and the inside of system housing 104 .
- apertures 138 establish flow channel 112 between needle 150 and receiving chamber 114 .
- Syringe 160 may then be activated to discharge fluid from syringe 160 through channel 112 into the Luer device or to withdraw fluid from the Luer device through channel 112 into syringe 160 .
- needle 150 may be withdrawn from system 100 .
- Spring 107 facilitates closure of septum 102 upon removal of needle 150 from septum 102 and maintains closure when septum 102 is not in use.
- Expansion portion 128 is compressed along center axis 101 by spring 107 to close the plurality of apertures 138 and seal chamber 130 from receiving chamber 114 , thus providing a positive seal to prevent fluid communication and reduce contamination when expansion portion 128 is in the closed position.
- the valve system is configured to prevent the piercing or coring of an expanding member, or septum, when a needle is inserted for fluid transfer through the system.
- the system described herein includes a housing, the septum, and a cap to contain the septum within the housing.
- the septum is formed from a resilient material and includes an expansion portion that extends into a receiving chamber of the housing from a closed position to an open position.
- the expansion portion includes a relief channel that facilitates such expansion and includes a plurality of apertures formed in the relief channel that are exposed when the septum is fully extended. The plurality of apertures facilitates the establishment of a fluid flow channel through the system between the needle and a medical device coupled to the opposite end of the system housing.
- the septum may be used in transferring a fluid between other types of devices.
- a needle or cannula and a vial for use in a pumping system for filling or emptying a vial or tube, or for transferring fluid between a needle and an IV line.
- a conventional needle such as a bevel-tipped needle may be used, or a blunt-tipped cannula including a side port.
- removal of the needle from the septum returns the septum to its closed position. Closing may be aided by the presence of a biasing mechanism within the housing for returning and maintaining the septum in a closed position, and sealing the septum from contaminates when not in use.
- the tip of the needle contacts a nosecone housed within a chamber within the expansion portion.
- the force of the needle advancing into the septum causes the expansion of the expansion portion.
- the nosecone not only facilitates extending the expansion portion to expose the apertures that create the fluid flow path, but also prevents the needle from coring the septum and introducing any particulates into the path. Preventing puncture or coring of the septum is particularly advantageous when the septum is used repeatedly.
- Exemplary embodiments of a medical valve system with an expanding member are described above in detail. The system and its components are not limited to the specific embodiments described herein, but rather, components of the valve may be used independently and separately from other components described herein.
- the expanding member may also be used in combination with other sealing systems and methods, and are not limited to practice with only the medical valve system as described herein.
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Abstract
Description
- The field relates generally to fluid valve systems, and more particularly to fluid valve systems having septa or a septum for receiving a needle.
- Many conventional valve systems for sealing a container, especially those used in a medical or therapeutic setting, include a septum designed to be pierced by a needle or cannula of a syringe. Fluid may be transferred through the needle from the container to the syringe or vice versa.
- Conventional needles often have holes at or near the tip of the needle. Holes through the septum formed by the needle may have an undesirable coring effect on the septum in which the needle undesirably removes a piece of the septum and creates particulates. These particulates may clog the needle or tube and obstruct the flow path of the fluid, or be released into the flow path and possibly into the patient. The particulates may further contaminate any fluid flowing through the flow path. Some septa have a pre-formed slit designed to receive the needle, but the needle may pierce the septum anywhere the tip makes contact, and may not necessarily be inserted through the slit area.
- Moreover, repeated piercings of a septum by either a needle or a cannula may cause deterioration of the septum. This deterioration may lead to leakage and contamination. Many conventional valve systems and septa are designed to be used once, and repeated insertions of a needle or cannula not only introduce particulates into the flow path, but also facilitate leakage through the septum from stretching and overuse. It is important that the septum reseal with enough force that fluids do not leak therefrom and that airborne particulate matter, bacterial or viral matter do not enter therethrough. A more satisfactory system is needed.
- This Background section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present disclosure, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.
- In one aspect, a valve system for receiving a needle comprises a housing defining at least a portion of a fluid flow channel. The housing includes a first end, a second end, and a receiving portion. A septum is mounted in the housing for sealing the first end of the housing. The septum includes a longitudinal axis and is formed from a resilient material. The septum also includes a head portion including a tapered opening configured to receive the needle, a sealing portion configured to create a seal around the needle, and an expansion portion extending from the head portion opposite the tapered opening. The expansion portion includes a chamber having a closed end, at least one relief channel, and apertures formed in the relief channel. The apertures facilitate fluid communication between the chamber and the receiving portion when the expansion portion is extended parallel to the longitudinal axis into the receiving portion in an open position. The apertures are also configured to prevent flow communication when the expansion portion is in a closed position.
- In another aspect, a septum comprises a head portion including a tapered opening configured to receive a needle about a longitudinal axis, a sealing portion configured to create a seal about a needle, and an expansion portion extending from the head portion opposite the tapered opening. The expansion portion includes a chamber having a closed end housed within the expansion portion, at least one relief channel, and a plurality of apertures formed in the relief channel. The apertures facilitate flow communication through the expansion portion when the expansion portion is extended parallel to the longitudinal axis in an open position. The apertures also prevent flow communication when the expansion portion is in a closed position.
- Various refinements exist of the features noted in relation to the above-mentioned aspects. Further features may also be incorporated in the above-mentioned aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to any of the illustrated embodiments may be incorporated into any of the above-described aspects, alone or in any combination.
-
FIG. 1 is an exploded perspective view of a valve system including a cap, a septum, and a housing of one embodiment; -
FIG. 2A andFIG. 2B respectively show perspective and side views of the septum ofFIG. 1 in a closed position; -
FIG. 3A andFIG. 3B respectively show perspective and side views of the septum ofFIG. 1 in an intermediate position; -
FIG. 4A andFIG. 4B respectively show perspective and side views of the septum ofFIG. 1 in an open position; -
FIG. 5 is a cross-section view of the valve system ofFIG. 1 with the septum in a closed position; -
FIG. 6 is a cross-section view of the valve system ofFIG. 1 with the septum in an intermediate position; -
FIG. 7 is a cross-section view of the valve system ofFIG. 1 with the septum in an open position; - Referring to
FIG. 1 , a system generally designated 100 is for use with a medical device of a fluid delivery system. However,system 100 may be used with other devices without departing from the scope of this disclosure. In this embodiment,system 100 is configured to prevent coring of an expanding member, such as aseptum 102, when a needle (not shown inFIG. 1 ) is inserted therein, while maintaining a fluid flow channel (not shown inFIG. 1 ) therethrough.System 100 includes acap 106 having atapered opening 122 for receiving the needle, ahousing 104 having afirst end 108 for receivingcap 106, areceiving chamber 114 for receivingseptum 102 that controls fluid flow throughsystem 100, and asecond end 110 to facilitate directing fluid betweensystem 100 and a medical device.Housing 104,septum 102, andcap 106 are configured to be coaxially aligned alonglongitudinal centerline axis 101. In this embodiment, the fluid is in liquid form and passes through a centrally formed fluid flow channel as described in further detail below. - Many known medical devices are configured to facilitate the passage of fluids therethrough. The term “medical device” may be used to indicate such medical instruments as surgical tubing, syringes, IV sets, medical valve connectors, and other such devices. Medical devices may include, but are not limited to the above list. As described below,
valve system 100 may be connected to a medical valve connector, such as a Luer connector. However,system 100 may be used to transfer a fluid between any two devices. For example, for transferring fluid between a needle or cannula and a vial, for use in a pumping system for filling or emptying a vial or tube, or for transferring fluid between a needle and an IV line. Furthermore, a conventional needle, such as a bevel-tipped needle may be used, or a blunt-tipped cannula including a side port. Alternatively, any needle or cannula may be used withsystem 100. - In this embodiment,
septum 102 is mounted withinhousing 104 ofsystem 100 for sealing housingfirst end 108 and is substantially secured withinhousing 104 bycap 106. Althoughsystem 100 is designed as a two-way fluid connector valve for flow of fluid between two medical devices, it is to be understood that the direction of fluid flow as well as the particular details, size and shape ofsystem 100 and its components may vary, including providing for one-way fluid flow, if desired. - As shown in
FIG. 1 ,cap 106 is configured to be coupled tofirst end 108 ofhousing 104. In this embodiment,cap 106 is coupled tohousing 104 via a press-fit connection. Alternatively,cap 106 may be coupled tofirst end 108 ofhousing 104 by any connection means that allows forsystem 100 to function as described herein, such as threadably coupled, snap-fit, or permanently attached.Cap 106 includes afirst end 119 and an opposingsecond end 121. Capfirst end 119 includes conically-taperedopening 122 that narrows withincap 106 and is defined by anannular guiding surface 120. Guidingsurface 120 extends intocap 106 such thatopening 122 terminates betweenfirst end 119 andsecond end 121. Guidingsurface 120 is configured to direct the needle through tapedopening 122.Cap 106 is formed of a hard, durable material such that contact with the needle does not damagecap 106. - In this embodiment,
septum 102 includes two adjacent elements or portions. In particular,septum 102 includes ahead portion 124 and anexpansion portion 128. Afirst end 123 ofhead portion 124 includes a secondtapered opening 136 configured to receive a needle andexpansion portion 128 includes a chamber (not shown inFIG. 1 ) defined therein and arelief channel 126.Expansion portion 128 extends from a head portionsecond end 125 opposite taperedopening 136. A sealing portion (not shown inFIG. 1 ) is defined withinseptum 102 betweentapered opening 136 and the chamber. The sealing portion is configured to create a seal about the needle. The chamber is configured to receive the needle such that a pushing force by the needle facilitates to elongateexpansion portion 128 alongaxis 101 as described in further detail below. -
Housing 104 includesfirst end 108 and opposing second and 110.First end 108 is configured to acceptcap 106 on anouter surface 109 and is further configured to receiveseptum 102 within receivingchamber 114 withinfirst end 108.Second end 110 includes afluid flow member 118 and a connector portion (not shown inFIG. 1 ) for connectingsystem 100 to a medical device, such as a Luer device. The connector portion may be threaded for ease of connection to the device. It is to be noted that any type of medical device may be connected to the connector portion of thesecond end 110. For ease of description,system 100 will be described with respect to the needle of a syringe being inserted intoopening 122 and a Luer device being connected to the connector portion of thesecond end 110, where the Luer device is in communication with a fluid delivery system, such as an I.V. set. The Luer device and I.V. set are omitted from the drawings for brevity. -
FIGS. 2A , 3A, and 4A illustrate a cross-sectional perspective view ofseptum 102 in the closed position, intermediate position, and open position, respectively.FIGS. 2B , 3B, and 4B show a perspective side view ofseptum 102 in the closed position, intermediate position, and open position, respectively.Septum 102 is made of a single piece of a substantially resilient material, such as rubber, latex, or silicone. Alternatively,septum 102 may be formed of any resilient material that enablessystem 100 to function as described herein. As described above,septum 102 includeshead portion 124 andexpansion portion 128.Head portion 124 includesfirst end 123 and opposingsecond end 125.Tapered opening 136 extends from head portionfirst end 123 toward head portionsecond end 125.Opening 136 is shaped substantially similarly to opening 122 such thatguide surface 120 is received intoopening 136 so as to direct the needle simultaneously through opening 122 ofcap 106 and opening 136 ofseptum 102. A sealingportion 132 is defined withinhead portion 124 ofseptum 102.Sealing portion 132 extends from head portionsecond end 125 toward head portionfirst end 123.Tapered opening 136 and sealingportion 132 are in flow communication such that a channel is defined throughhead portion 124 between first and second ends 123 and 125. - In this embodiment,
expansion portion 128 extends from head portionsecond end 125 opposite sealingportion 132 andopening 136.Expansion portion 128 includes achamber 130 defined therein.Chamber 130 extends withinexpansion portion 128 between sealingportion 132 and aclosed end 134 ofchamber 130.Septum 102 is configured such thatopening 136, sealingportion 132, andchamber 130 are co-axial aboutcenterline 101 and form a single-ended tunnel between head portionfirst end 123 and chamber closedend 134. -
Expansion portion 128 further includes arelief channel 126 formed in anouter wall 127 ofexpansion portion 128 and has a depth of approximately half the thickness ofouter wall 127. Alternatively,relief channel 126 may be of any depth that facilitatesseptum 102 to function as described herein. In this embodiment,relief channel 126 is a continuously-spiraled channel defined between head portionsecond end 125 and a distal tip ofexpansion portion 128.Relief channel 126 terminates with a complete circular cut about the base ofextension portion 128 at the union ofexpansion portion 128 and head portionsecond end 125. Alternatively,relief channel 126 may be a plurality or series of individual channels formed inouter wall 127. -
FIGS. 2A and 2B showseptum 102 in the relaxed, or closed, position, whereinexpansion portion 128 is at rest and has a first length L1. In the closed position,relief channel 126 is closed and appears as a spiraled line aboutexpansion portion 128.FIGS. 3A and 3B showseptum 102 in an intermediate position, whereinexpansion portion 128 is at least partially expanded. In the intermediate position,expansion portion 128 has a second length L2, which is greater than first length L1. Furthermore,extension portion 128 is extended in a longitudinal direction alongaxis 101 such thatrelief channel 126 becomes more defined and begins to separate.Expansion portion 128 lengthens in the intermediate position such that the interior volume ofchamber 130 is greater in the intermediate position than in the closed position.FIGS. 4A and 4B showseptum 102 in the fully open position, whereinexpansion portion 128 has a third length L3 greater than first and second lengths, L1 and L2. In the open position,expansion portion 128 is fully expanded and the interior volume ofchamber 130 is greater in the open position than in the intermediate and closed positions. In the open position,relief channel 126 is fully open and exposes a plurality ofapertures 138 defined withinrelief channel 126.Apertures 138 facilitate flow communication throughouter wall 127 ofexpansion portion 128 betweenchamber 130 and the atmosphere surroundingexpansion portion 128. In this embodiment,apertures 138 facilitate fluid flow throughexpansion portion 128 betweenchamber 130 and receivingchamber 114 ofhousing 104 whenexpansion portion 128 is extended parallel tolongitudinal axis 101 into receivingchamber 114 in the open position, as shown inFIGS. 5-7 . -
FIG. 5 is a cross-section ofsystem 100 withseptum 102 in the closed position.FIG. 6 is a cross-section view ofsystem 100 withseptum 102 in the intermediate position.FIG. 7 is a cross-section view ofsystem 100 withseptum 102 in the open position. In this embodiment,septum 102 is configured to sealfirst end 108 ofhousing 104. Specifically,septum 102 is mounted into receivingchamber 114 ofhousing 104.Septum 102 is contained within receivingchamber 114 bycap 106, which is coupled tofirst end 108 ofhousing 104. Specifically,cap 106 is coupled toouter surface 109 of housingfirst end 108 via a press-fit. Alternatively,cap 106 may be removably coupled to housing first end via interlocking threads or any other removable coupling means.System 100 is configured such thatguide surface 120 ofcap 106 is adjacent to taperedopening 136 such thatopening 122 ofcap 106, taperedopening 136, and sealingportion 132 ofseptum head portion 124 are coaxial alongcenter axis 101 to simultaneously receive aneedle 150 inserted therethrough. -
Expansion portion 128 extends a distance L1 into receivingchamber 114 ofhousing 104 fromhead portion 124 ofseptum 102 when in the closed position (shown inFIG. 5 ). In the closed position, sealingportion 132 has a first diameter D1. System 100 further includes anosecone 103 housed withinclosed end 134 ofchamber 130 ofseptum 102. In this embodiment,nosecone 103 is formed of a metallic material, such as stainless steel, and is configured to prevent the piercing ofseptum 102 byneedle 150 and to facilitate extension ofexpansion portion 128 during a transition from the closed position to the open position to establish a fluid flow channel as described in further detail below. Furthermore,nosecone 103 is configured to alignexpansion portion 128 withlongitudinal axis 101. -
System 100 further includes abiasing mechanism 105 to facilitate operation ofsystem 100, and, more specifically,septum 102. In this embodiment,biasing mechanism 105 is acoil spring 107 positioned within receivingchamber 114 ofhousing 104 betweenfluid flow member 118 and a distal end ofexpansion portion 128. Alternatively,biasing mechanism 105 may be a spring that forms a portion of the resilient material comprisingexpansion portion 128 ofseptum 102.Biasing mechanism 105 is configured to facilitate closure ofseptum 102 when transitioning from the open position to the closed position as described in further detail below. - In this embodiment, housing
second end 110 ofsystem 100 includesfluid flow member 118 andconnector portion 117 forcoupling system 100 to a medical device (not shown).Fluid flow member 118 extends between housingsecond end 110 and receivingchamber 114 throughconnector portion 117, and is coaxial with receivingchamber 114,expansion portion 128, andopenings center axis 101.Fluid flow member 118 is configured to facilitate the passage of fluid throughsystem 100. Aninterior surface 115 ofhousing connector portion 117 is formed to include one or more threads orsimilar members 116 for connection of medical device, such as a Luer device. It is to be noted that any type of medical device may be connected toconnector portion 117 ofsecond end 110. For ease of description,system 100 will be described with respect toneedle 150 of asyringe 160 being inserted intoopening 122 and a Luer device being connected toconnector portion 117 of thesecond end 110, where the Luer device is in communication with a fluid delivery system, such as an I.V. set. The Luer device and I.V. set are omitted from the drawings for simplicity. - In operation, the Luer device of this embodiment is threadably coupled to
connector portion 117 of housingsecond end 110.FIG. 6 showssyringe 160 andneedle 150, having a diameter D2, being inserted intosystem 100 withseptum 102 in the intermediate position.Needle 150 is directed byguide surface 120 intosystem 100 throughcap opening 122 andseptum opening 136.Guide surface 120 is configured to directneedle 150 throughopenings tip 154 ofneedle 150damaging head portion 124 ofseptum 102. In this embodiment, diameter D1 (shown inFIG. 5 ) of sealingportion 132 in the closed position is smaller than the diameter D2 of needle, such that asneedle 150 penetrates opening 136, sealingportion 132 ofseptum 102 expands radially to accommodate thelarger diameter needle 150. Accordingly, a seal is created aboutneedle 150 at sealingportion 132 ofseptum 102 that excludes exterior gases, liquids, or airborne matter fromhousing 104. - As
needle 150 is inserted through sealing portion,needle tip 154 advances throughchamber 130 and impingesnosecone 103 atclosed end 134 ofchamber 130. In this embodiment,nosecone 103 prevents the piercing or coring ofseptum 102 byneedle tip 154. By preventing such coring,system 100 eliminates the possibility of particulates fromseptum 102clogging needle 150, contaminating the fluid transferred, or being introduced into the patient. During advancement ofneedle 150 intosystem 100, whenseptum 102 is in the intermediate position (shown inFIG. 6 ), insertion ofneedle 150 facilitates deformation ofseptum 102 by extendingexpansion portion 128 into receiving chamber a distance L2, which is greater than distance L1. Relief channel 126 facilitates such expansion by allowingexpansion portion 128 to extend into receivingchamber 114 alongcenter axis 101. The extension ofexpansion portion 128compresses biasing mechanism 105 andcoil spring 107 within receivingchamber 114.Spring 107 provides resistance to and limits the extension ofexpansion portion 128 within receivingchamber 114 to avoid damage toseptum 102 whenseptum 102 is in the open position (shown inFIG. 7 ). - In this embodiment, as
needle 150 is advanced farther intosystem 100,expansion portion 128 transitions from the intermediate position to the open position. The continued force ofneedle tip 154 uponnosecone 103 extendsexpansion portion 128 parallel toaxis 101 into receiving chamber 114 a distance L3, which is greater than both distances L1 and L2, in the open position.Nosecone 103 also prevents obstruction of aneedle side port 152 by aninterior wall 142 ofchamber 130 by acting as a spacer betweenside port 152 andinterior wall 142. The extension ofexpansion portion 128 further compresses spring 107 such thatspring 107 limits the extension ofexpansion portion 128 to preventdamaging septum 102. In this embodiment,expansion portion 128 is fully extended in the open position such thatrelief channel 126 fully opens to expose a plurality ofapertures 138 defined therein. - In the open position of
FIG. 7 ,fluid flow member 118, receivingchamber 114, andseptum 102 form afluid flow channel 112 throughhousing 104 ofsystem 100 to facilitate the transfer of fluid betweensyringe 160 and the Luer device. Accordingly, whenseptum 102 is in the open position, fluid may flow through the following structures (in the noted order), which as a whole make up fluid flow channel 112:syringe 160;needle 150; chamber 130 (via needle side port 152); receiving chamber 114 (via apertures 138);fluid flow member 118; and the Luer device. - The plurality of
apertures 138 and extension ofexpansion portion 128 facilitate fluid communication betweensyringe 160 and the inside ofsystem housing 104. Specifically,apertures 138 establishflow channel 112 betweenneedle 150 and receivingchamber 114.Syringe 160 may then be activated to discharge fluid fromsyringe 160 throughchannel 112 into the Luer device or to withdraw fluid from the Luer device throughchannel 112 intosyringe 160. Once operation ofsyringe 160 is complete,needle 150 may be withdrawn fromsystem 100.Spring 107 facilitates closure ofseptum 102 upon removal ofneedle 150 fromseptum 102 and maintains closure whenseptum 102 is not in use.Expansion portion 128 is compressed alongcenter axis 101 byspring 107 to close the plurality ofapertures 138 andseal chamber 130 from receivingchamber 114, thus providing a positive seal to prevent fluid communication and reduce contamination whenexpansion portion 128 is in the closed position. - The valve system is configured to prevent the piercing or coring of an expanding member, or septum, when a needle is inserted for fluid transfer through the system. The system described herein includes a housing, the septum, and a cap to contain the septum within the housing. The septum is formed from a resilient material and includes an expansion portion that extends into a receiving chamber of the housing from a closed position to an open position. The expansion portion includes a relief channel that facilitates such expansion and includes a plurality of apertures formed in the relief channel that are exposed when the septum is fully extended. The plurality of apertures facilitates the establishment of a fluid flow channel through the system between the needle and a medical device coupled to the opposite end of the system housing. Although the system is described as being connected to a Luer connector, the septum may be used in transferring a fluid between other types of devices. For example, for transferring fluid between a needle or cannula and a vial, for use in a pumping system for filling or emptying a vial or tube, or for transferring fluid between a needle and an IV line. A conventional needle, such as a bevel-tipped needle may be used, or a blunt-tipped cannula including a side port. After the transfer of desired fluid, removal of the needle from the septum returns the septum to its closed position. Closing may be aided by the presence of a biasing mechanism within the housing for returning and maintaining the septum in a closed position, and sealing the septum from contaminates when not in use.
- To facilitate expansion of the septum from the closed position to the open position, the tip of the needle contacts a nosecone housed within a chamber within the expansion portion. The force of the needle advancing into the septum causes the expansion of the expansion portion. The nosecone not only facilitates extending the expansion portion to expose the apertures that create the fluid flow path, but also prevents the needle from coring the septum and introducing any particulates into the path. Preventing puncture or coring of the septum is particularly advantageous when the septum is used repeatedly. Exemplary embodiments of a medical valve system with an expanding member are described above in detail. The system and its components are not limited to the specific embodiments described herein, but rather, components of the valve may be used independently and separately from other components described herein. For example, the expanding member may also be used in combination with other sealing systems and methods, and are not limited to practice with only the medical valve system as described herein.
- When introducing elements of the present disclosure or the embodiment(s) thereof, the articles “a”, “an”, “the” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” “containing” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. The use of terms indicating a particular orientation (e.g., “top”, “bottom”, “side”, etc.) is for convenience of description and does not require any particular orientation of the item described.
- As various changes could be made in the above constructions and methods without departing from the scope of the disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawing(s) shall be interpreted as illustrative and not in a limiting sense.
Claims (26)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US13/802,935 US20140263322A1 (en) | 2013-03-14 | 2013-03-14 | Coring-free valve system |
PCT/US2014/020582 WO2014158859A1 (en) | 2013-03-14 | 2014-03-05 | Coring-free valve system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/802,935 US20140263322A1 (en) | 2013-03-14 | 2013-03-14 | Coring-free valve system |
Publications (1)
Publication Number | Publication Date |
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US20140263322A1 true US20140263322A1 (en) | 2014-09-18 |
Family
ID=50346148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/802,935 Abandoned US20140263322A1 (en) | 2013-03-14 | 2013-03-14 | Coring-free valve system |
Country Status (2)
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US (1) | US20140263322A1 (en) |
WO (1) | WO2014158859A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2018507755A (en) * | 2015-03-16 | 2018-03-22 | エクアシールド メディカル リミテッド | Diaphragm holder for syringe connector |
CN111819437A (en) * | 2017-12-20 | 2020-10-23 | 色谱研究供应股份有限公司 | Diaphragm with chamber |
US11951273B2 (en) | 2020-03-06 | 2024-04-09 | B. Braun Melsungen Ag | Coupling system for a closed fluid transfer system |
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Also Published As
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